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"Social Distancing". safety-security.uchicago.edu. Department of Safety & Security, The University of Chicago. 2015. Diarsipkan dari versi asli tanggal 24 March 2020. Diakses tanggal 29 March 2020.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
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worldcat.org
Drews, Kelly (1 May 2013). "A Brief History of Quarantine". The Virginia Tech Undergraduate Historical Review (dalam bahasa Inggris). 2. doi:10.21061/vtuhr.v2i0.16. ISSN2165-9915.